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metal halide for growing weed

Metal halide for growing weed

Cannabis plants like having a lot of fresh air all the time, and they will reward you for your diligence in setting up a proper exhaust system.

Some ballasts support both Metal Halide and High Pressure Sodium, and will clearly state that on the box.

Learn how to make a stealthy “secret window” exhaust system like this below…

MH/HPS Grow Lights

Exhaust Efficiency – Every exhaust system has some level of inefficiency which will lower the amount of air being moved by the fan. This step tells you how much extra air-moving power needed to compensate. With an efficient exhaust, air goes in a short, straight line after passing through the fan. An inefficient path is when air has to go a long way after leaving the fan, or if the air has to go around turns instead of being in a straight line. This step will help make sure your fan is moving enough air to properly ventilate your space.
• Efficient path – multiply previous number by 2
• Inefficient path – multiply previous number by 3

Additionally, many cooltube owners have reported that they can create unexpected hot spots (places where light can focus and burn plants). A cooltube is better than a wing, but not as good as an air-cooled hood.

The following section will teach you what you need to know about setting up and using your MH/HPS grow lights for growing cannabis. I’ll share the hints and tips I’ve learned along the way to help you achieve the best results with your new lights!

Setting Up & Using Your MH/HPS Grow Lights

MH lights are generally used in the vegetative stage of growth (when plants are young and growing just stems and leaves), while HPS lights are considered optimal for use during the flowering stage when cannabis plants are producing buds. HPS lights can be used for the entire grow and will still get great results. Modern ballasts often allow a grower to interchange MH and HPS bulbs, but it’s important you look for this feature if you want to use a combination of both MH and HPS. Learn more.

Metal halide for growing weed

If you have questions about all the grow light options, head over to our in depth guide to cannabis grow lights.

Metal Halide Grow Lights For Cannabis

As a grower, you will adhere to one of two lighting programs in indoor cannabis cultivation: LED or HID. High-intensity discharge lighting (HID) is the traditional (and arguably most intense) option. Under this umbrella are two types: High-Pressure Sodium (HPS) and Metal Halide (MH).

Metal Halide Light Spectrum is Ideal for Veg

Here we discuss metal halide fixtures in detail, including applications for growing cannabis (hint: it’s in the veg room), lifespan, energy considerations, and other technical details worth noting.